I still don't think that they beef up different mobs with the same names; they just swap in tougher mobs in the place of the easy ones. I can one-hit skeletons now, at level 20, when I couldn't at level 10. I just don't experience as many low-level mobs.
Whether it's swapping in tougher mobs or beefing up the same ones, though, it's basically the same thing. Since the system levels you based on skills, rather than experience, I don't think there's an alternative.
It's not realistic, perhaps, that you can walk almost anywhere in Skyrim at level 3 and not immediately die... and it's not realistic, perhaps, that the world gets tougher as you do.
Making zones, like WoW and some other games, where there are low-level creatures to kill (who are easy, but give almost nothing in XP) or really tough ones (where low-level characters would die immediately) is worse for the ES system.
I think that if they did NOT do that, then the game would be too easy. You could get to level 25, have a bunch of hitpoints and a badass destruction skill level, and then grab an iron sword and work up your one handed weapons skill on a bunch of n00b mobs... and you'd level up as you got better at that.
You'd quickly go from level 25 to 35 with little chance of dying (you have so many HPs that even if you suck using that sword, you're not going to die), which gives you even more HPs. You could then go back through the same mobs with a two-handed sword and it'd be even easier. That is a whole different kind of game.
Ed O.